Everything going FX larger? DX becoming obsolete? -Not so sure about that...
FX becoming smaller?
Well, it has. Isn't that what DX is all about?
The trend now is to smaller and smaller cameras, and this holds true for DSLRs also. Look at the new Micro and 4/3'ds and Evl cameras, they're all imitating DSLRs but in a smaller vein.
There are hobbyists who want to get more serious by moving from P+S to DSLR photography, and many of these want the DSLR features w/o the bulk and weight of a big FX rig...
I myself love the convenience of the smaller DX format, and how it makes the lenses 1.5 times more powerful. My f1.8 35mm for instance is a perfect 53mm on my DX D40, and the kind of photography it's capable of is really not all that much behind FX. (For my purposes anyway?)
You may not believe this, but if I had all the $$ I wanted to spend on photo gear I would definitely still keep my D40, spend a fortune on DX lenses for it, and also do some experimenting with cool little cameras like the Olympus Pen and Panasonic Luminex series... The largest rig I'd consider might be the excellent Nikon D300s (even tho I deplore adding the bulk of video into a DSLR), -but then the D300s is in the DX format also... ">})
Oh, and I also had a D70 before this. I got it from a friend at a generous price and bought an old 75-240mm for it, plus a newer used 18-55mm DX lens. After trying it for a while I discovered I didn't like the hefty bulk of it, and sold it off to obtain the very cool little D40, -And I've been continuously happy regarding this move ever since!
Why? Because I'm not a pro. I don't want to haul around bigger and heavier cameras for the advantages they would give me. The smaller DX cameras are so good now it's just not worth it to me to go FX! I do believe there will be a demand for FX tho; for pros and for the people who like to feel like pros... But years ago the pros carried around these huge Speed Graphics while the rest of us were busy discovering the neat little 35mm film cameras... Did the big cameras win out there, or did the pros eventually convert to the smaller 35mm format? ">})
So I think just because you like FX stuff better doesn't mean that the rest of us who love photography will also... Historically it seems the move has always been that smaller and more technically efficient does best, rather than bigger is better? -Look at computers and IPods, and you'll see the way non-professional camera sizes are moving also.....
Anyway, too bad I wasn't around when you were selling off all your DX lenses. -My D40 is hungry for more glass... ">})